python:创建字典时如何禁用自动排序 [英] python : how to disable auto sort when creating dictionary

问题描述

在这种情况下，我需要帮助:

i need help for this case :

m={}
m[1]=1
m[333]=333
m[2]=2

# Result:
{1: 1, 2: 2, 333: 333}

因此，即使我最后一次没有输入'333'，在打印出来时，我也会在字典的末尾列出该'333'.为什么这个字典"进行自动排序?以及如何禁用它?我可以创建一个功能来重新排序以修复订单.但这不是我想要的，我只是想打印并获得输出顺序，就像输入数据时的顺序一样.有什么好的解释和解决方案吗?

so even when i didn't enter '333' the last, i got this '333' listed in the end of the dictionary when print it out. why is this 'dictionary' doing auto sort? and how disable it? i can creata a function to re-sort to fix the order. but that's not what i want, i just simply want to print and get output order just like the order when i input the data. Is there any good explanation and is there any solution ?

推荐答案

它没有排序. dict根本没有排序，因此您不能以任何方式影响键的顺序.在2.7和3.1及更高版本中，有 collections.OrderedDict ，也有<适用于2.4-2.6的href ="http://pypi.python.org/pypi/ordereddict" rel ="noreferrer">独立模块.

It is not sorting. dict is not ordered at all, so you cannot influence the key order in any way. There is collections.OrderedDict in 2.7 and 3.1+, there is also standalone module for 2.4-2.6.

这篇关于python:创建字典时如何禁用自动排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！